84078587 has 2 divisors, whose sum is σ = 84078588. Its totient is φ = 84078586.

The previous prime is 84078581. The next prime is 84078601. The reversal of 84078587 is 78587048.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84078587 - 2⁴ = 84078571 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84078581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42039293 + 42039294.

It is an arithmetic number, because the mean of its divisors is an integer number (42039294).

Almost surely, 2^84078587 is an apocalyptic number.

84078587 is a deficient number, since it is larger than the sum of its proper divisors (1).

84078587 is an equidigital number, since it uses as much as digits as its factorization.

84078587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 84078587 is about 9169.4376599658. The cubic root of 84078587 is about 438.0884481137.

The spelling of 84078587 in words is "eighty-four million, seventy-eight thousand, five hundred eighty-seven".